Q: Based on the information present in the given passage, you need to write a correct answer to the given question. A correct answer is one that correctly and completely answers the question. Do not write answers that address the question partially or incorrectly. The correct answer must be contained in the given paragraph.
Paragraph- Sent 1: An insect can have one of three types of change in its life.
Sent 2: A metamorphosis describes how insects change.
Sent 3: Some insects do not go through a change.
Sent 4: Instead, the young look like small versions of adults.
Sent 5: The only change between young and mature is size.
Sent 6: Other types of insects go through a change in physical appearance.
Sent 7: There are two types of this type of change.
Sent 8: Some insects change only slightly during their change.
Sent 9: This type is called incomplete metamorphosis.
Sent 10: Other types of insects go through a major change.
Sent 11: They don't look at all like the adult when they are born.
Sent 12: This type of change is called complete metamorphosis.
Sent 13: Occurs in the most primitive insects.
Sent 14: Newborn insect looks like a tiny version of the adult.
Sent 15: Incomplete Three stages: egg, nymph, and adult.
Sent 16: Young, called nymphs, usually similar to adult.
Sent 17: Growth occurs during the nymph stage. 
Question: What is it called when an insect goes through a major change and does not look anything like it did when it was born?.
A:
Complete metamorphosis.